ETC LA2351M

Ordering number : ENN*6955
Monolithic Linear IC
LA2351M
7.5 Mbps Automotive LAN Transceiver
Preliminary
Overview
Package Dimensions
The LA2351M is a low-noise transceiver for automotive
LANs.
unit: mm
3073C-MFP30SD
Featrues
[LA2351M]
15.2
0.65
1
Functions
16
7.9
30
10.5
• Implements 5 Mbps and 7.5 Mbps automotive LANs
when used in conjunction with an automotive LAN
protocol IC (ARCNET controller TMC20040C Series
device).
• Built-in adjustment-free low-pass filter.
• Provides low-noise data communication.
1.0
0.4
15
0.25
0.1 (2.25)
• Transmitter block
— D/A converter (3-bit)
— Low-pass filter (for EMI prevention)
— Output driver
• Receiver block
— Receiver amplifier
— Noise removal low-pass filter (for the received
signal)
— Comparator (used for wave shaping)
2.45max
(0.6)
SANYO: MFP30SD
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
51801RM (OT) No. 6955-1/4
LA2351M
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Maximum supply voltage
Allowable power dissipation
Conditions
Ratings
Unit
VCC max
With no input signal
7.0
V
Pd max
Ta ≤ 85°C
Mounted on a printed circuit board
(46.2 × 25.7 × 1.6 mm3, glass epoxy)
500
mW
Operating temperature
Topr
–40 to +85
°C
Storage temperature
Tstg
–55 to +150
°C
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Recommended supply voltage
VCC
Operating supply voltage range
VCCOP
Vol
D/A converter input
Transmission control input
Conditions
Ratings
min
typ
Unit
max
5.0
4.75
Low-level input
Voh
High-level input
Vol
Low-level input
Voh
High-level input
0
2.4
V
5.25
V
0.5
V
3.3
V
0.5
V
2.4
V
Low-pass filter input amplitude
Vlpfi
0.45
0.55
Vpp
Output driver input amplitude
Vdrvi
0.45
0.55
Vpp
Receiver amplifier input signal amplitude
range (differential)
Vrxi
15
75
0
3.5
V
0.8
1.2
Vpp
Comparator input voltage range
Vcpdci
Comparator input signal amplitude
Vcpi
mVpp
Operating Characteristics at Ta = 25°C, VCC = 5 V
Parameter
Symbol
Quiescent current
Conditions
Icco
When not transmitting
Vdao
The deviation with respect to 0.5 V for
(111) - (001).
Output attenuation
Insertion loss
Ratings
min
typ
Unit
max
50
70
mA
–1
0
1
dB
Vlpfo(9M) The attenuation of a 9 MHz signal with
respect to a 1 MHz signal.
2.5
3
3.5
dB
Vlpfo(1M) f = 1 MHz
–1
0
1
dB
0
2
3
–1.5
0
1.5
D/A converter output level
Low-pass filter
Output driver
Output attenuation
The attenuation of a 15 MHz signal with
Vtxo(15M) respect to a 1MHz signal.
Differential amplification
Vtxo(1M)
f = 1 MHz
Receiver amplifier + noise rejection low-pass filter
Amplification
Vnfo(1M) f = 1 MHz
25
dB
Frequency characteristics
The Frequency characteristics of a 15 MHz
Vnfo(15M)
signal with respect to a 1 MHz signal.
–3
dB
Comparator
Low-level output amplitude
Vcpdl
0.2
0.4
0.6
V
High-level output amplitude
Vcpdh
3.9
4.2
4.3
V
No. 6955-2/4
LA2351M
Pin Functions
Pin No.
Pin
1
VCC2
Function
Comparator block power supply
Description
Note
5V
2
CPD2
Comparator inverted output
Vol = 0.4 V, Voh = 4.2 V (Maximum voltage: VCC2)
3
CPD1
Comparator noninverted output
Vol = 0.4 V, Voh = 4.2 V (Maximum voltage: VCC2)
4
GND2
Comparator block ground
Dedicated ground for the comparator block
5
CP1
Comparator input (+)
6
NFO
Noise rejection filter output
7
CP2
Comparator input (-)
8
GND
Ground
System ground
9
FCC1
Transmission rate setting
Low: 5 Mbps, High: 7.5 Mbps
10
BIASC
Comparator bias
Connect to ground through a capacitor
11
FADJ1
Noise rejection low-pass filter cutoff
frequency adjustment
Adjusted with a resistor to ground
Standard setting: Open
12
FADJ2
Low-pass filter cutoff frequency adjustment
Adjusted with a resistor to ground
Standard setting: Open
Receiver amplifier amplification adjustment
Adjusted with a resistor to ground (capacitor coupled
ground)
Standard setting: 0 Ω
13
GCNT
14
RXI2
Reception signal inverting input
15
RXI1
Reception signal noninverting input
16
BIAS2
Bias voltage
17
BIAS1
Bias voltage
18
TXO2
Transmission signal noninverted output
19
TXO1
Transmission signal inverted output
20
NC2
Unused
21
NC1
Unused
22
DRVI
Output driver input
23
LPFO
Low-pass filter output
24
VCC1
Power supply
+5.0 V ± 5%
25
/TXEN
Transmit/receive switching
Low: transmit, High: receive (Vol = 0.5 V, Voh = 2.4 V)
26
LPFI
Low-pass filter input
27
DAO
D/A converter output
0.5 Vpp ± 1dB
28
TXI2
D/A converter input (MSB)
Vol = 0.5 V, Voh = 2.4 V
29
TXI1
D/A converter input
Vol = 0.5 V, Voh = 2.4 V
30
TXI0
D/A converter input (LSB)
Vol = 0.5 V, Voh = 2.4 V
No. 6955-3/4
LA2351M
Test Circuit
VCC
DAC
0.1µ
RADO
TXI0
TXI1
TXI2
30
29
28
0.1µ
0.1µ
3.3µ
0.1µ
0.1µ
TXEN
27
26
VCC
25
DAC
0.1µ
0.1µ
24
23
22
21
20
19
18
17
16
14
15
LPF
Driver Amp
Receiver Amp
Noise
Filter
Comparater
VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
2.2k
3.3µ
0.1µ
0.1µ
OUTPUT
VCC
COMP.
GND
0.1µ
0.1µ
33k
3.3 V
DATA OUT
0.1µ
GND CUT_OFF
CONTRO
COMP
BIAS
VCC
0.1µ
5.6k
330
330
5.6k 0.1µ
2.2k
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer’s
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer’s products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
This catalog provides information as of May, 2001. Specifications and information herein are subject to
change without notice.
PS No. 6955-4/4